research supporting homework

Is Homework Good for Kids? Here’s What the Research Says

A s kids return to school, debate is heating up once again over how they should spend their time after they leave the classroom for the day.

The no-homework policy of a second-grade teacher in Texas went viral last week , earning praise from parents across the country who lament the heavy workload often assigned to young students. Brandy Young told parents she would not formally assign any homework this year, asking students instead to eat dinner with their families, play outside and go to bed early.

But the question of how much work children should be doing outside of school remains controversial, and plenty of parents take issue with no-homework policies, worried their kids are losing a potential academic advantage. Here’s what you need to know:

For decades, the homework standard has been a “10-minute rule,” which recommends a daily maximum of 10 minutes of homework per grade level. Second graders, for example, should do about 20 minutes of homework each night. High school seniors should complete about two hours of homework each night. The National PTA and the National Education Association both support that guideline.

But some schools have begun to give their youngest students a break. A Massachusetts elementary school has announced a no-homework pilot program for the coming school year, lengthening the school day by two hours to provide more in-class instruction. “We really want kids to go home at 4 o’clock, tired. We want their brain to be tired,” Kelly Elementary School Principal Jackie Glasheen said in an interview with a local TV station . “We want them to enjoy their families. We want them to go to soccer practice or football practice, and we want them to go to bed. And that’s it.”

A New York City public elementary school implemented a similar policy last year, eliminating traditional homework assignments in favor of family time. The change was quickly met with outrage from some parents, though it earned support from other education leaders.

New solutions and approaches to homework differ by community, and these local debates are complicated by the fact that even education experts disagree about what’s best for kids.

The research

The most comprehensive research on homework to date comes from a 2006 meta-analysis by Duke University psychology professor Harris Cooper, who found evidence of a positive correlation between homework and student achievement, meaning students who did homework performed better in school. The correlation was stronger for older students—in seventh through 12th grade—than for those in younger grades, for whom there was a weak relationship between homework and performance.

Cooper’s analysis focused on how homework impacts academic achievement—test scores, for example. His report noted that homework is also thought to improve study habits, attitudes toward school, self-discipline, inquisitiveness and independent problem solving skills. On the other hand, some studies he examined showed that homework can cause physical and emotional fatigue, fuel negative attitudes about learning and limit leisure time for children. At the end of his analysis, Cooper recommended further study of such potential effects of homework.

Despite the weak correlation between homework and performance for young children, Cooper argues that a small amount of homework is useful for all students. Second-graders should not be doing two hours of homework each night, he said, but they also shouldn’t be doing no homework.

Not all education experts agree entirely with Cooper’s assessment.

Cathy Vatterott, an education professor at the University of Missouri-St. Louis, supports the “10-minute rule” as a maximum, but she thinks there is not sufficient proof that homework is helpful for students in elementary school.

“Correlation is not causation,” she said. “Does homework cause achievement, or do high achievers do more homework?”

Vatterott, the author of Rethinking Homework: Best Practices That Support Diverse Needs , thinks there should be more emphasis on improving the quality of homework tasks, and she supports efforts to eliminate homework for younger kids.

“I have no concerns about students not starting homework until fourth grade or fifth grade,” she said, noting that while the debate over homework will undoubtedly continue, she has noticed a trend toward limiting, if not eliminating, homework in elementary school.

The issue has been debated for decades. A TIME cover in 1999 read: “Too much homework! How it’s hurting our kids, and what parents should do about it.” The accompanying story noted that the launch of Sputnik in 1957 led to a push for better math and science education in the U.S. The ensuing pressure to be competitive on a global scale, plus the increasingly demanding college admissions process, fueled the practice of assigning homework.

“The complaints are cyclical, and we’re in the part of the cycle now where the concern is for too much,” Cooper said. “You can go back to the 1970s, when you’ll find there were concerns that there was too little, when we were concerned about our global competitiveness.”

Cooper acknowledged that some students really are bringing home too much homework, and their parents are right to be concerned.

“A good way to think about homework is the way you think about medications or dietary supplements,” he said. “If you take too little, they’ll have no effect. If you take too much, they can kill you. If you take the right amount, you’ll get better.”

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Research Trends: Why Homework Should Be Balanced

Research suggests that while homework can be an effective learning tool, assigning too much can lower student performance and interfere with other important activities.

Homework: effective learning tool or waste of time?

Since the average high school student spends almost seven hours each week doing homework, it’s surprising that there’s no clear answer. Homework is generally recognized as an effective way to reinforce what students learn in class, but claims that it may cause more harm than good, especially for younger students, are common.

Here’s what the research says:

• In general, homework has substantial benefits at the high school level, with decreased benefits for middle school students and few benefits for elementary students (Cooper, 1989; Cooper et al., 2006).
• While assigning homework may have academic benefits, it can also cut into important personal and family time (Cooper et al., 2006).
• Assigning too much homework can result in poor performance (Fernández-Alonso et al., 2015).
• A student’s ability to complete homework may depend on factors that are outside their control (Cooper et al., 2006; OECD, 2014; Eren & Henderson, 2011).
• The goal shouldn’t be to eliminate homework, but to make it authentic, meaningful, and engaging (Darling-Hammond & Ifill-Lynch, 2006).

Why Homework Should Be Balanced

Homework can boost learning, but doing too much can be detrimental. The National PTA and National Education Association support the “10-minute homework rule,” which recommends 10 minutes of homework per grade level, per night (10 minutes for first grade, 20 minutes for second grade, and so on, up to two hours for 12th grade) (Cooper, 2010). A recent study found that when middle school students were assigned more than 90–100 minutes of homework per day, their math and science scores began to decline (Fernández-Alonso, Suárez-Álvarez, & Muñiz, 2015). Giving students too much homework can lead to fatigue, stress, and a loss of interest in academics—something that we all want to avoid.

Homework Pros and Cons

Homework has many benefits, ranging from higher academic performance to improved study skills and stronger school-parent connections. However, it can also result in a loss of interest in academics, fatigue, and a loss of important personal and family time.

Grade Level Makes a Difference

Although the debate about homework generally falls in the “it works” vs. “it doesn’t work” camps, research shows that grade level makes a difference. High school students generally get the biggest benefits from homework, with middle school students getting about half the benefits, and elementary school students getting few benefits (Cooper et al., 2006). Since young students are still developing study habits like concentration and self-regulation, assigning a lot of homework isn’t all that helpful.

Parents Should Be Supportive, Not Intrusive

Well-designed homework not only strengthens student learning, it also provides ways to create connections between a student’s family and school. Homework offers parents insight into what their children are learning, provides opportunities to talk with children about their learning, and helps create conversations with school communities about ways to support student learning (Walker et al., 2004).

However, parent involvement can also hurt student learning. Patall, Cooper, and Robinson (2008) found that students did worse when their parents were perceived as intrusive or controlling. Motivation plays a key role in learning, and parents can cause unintentional harm by not giving their children enough space and autonomy to do their homework.

Homework Across the Globe

OECD , the developers of the international PISA test, published a 2014 report looking at homework around the world. They found that 15-year-olds worldwide spend an average of five hours per week doing homework (the U.S. average is about six hours). Surprisingly, countries like Finland and Singapore spend less time on homework (two to three hours per week) but still have high PISA rankings. These countries, the report explains, have support systems in place that allow students to rely less on homework to succeed. If a country like the U.S. were to decrease the amount of homework assigned to high school students, test scores would likely decrease unless additional supports were added.

Homework Is About Quality, Not Quantity

Whether you’re pro- or anti-homework, keep in mind that research gives a big-picture idea of what works and what doesn’t, and a capable teacher can make almost anything work. The question isn’t  homework vs. no homework ; instead, we should be asking ourselves, “How can we transform homework so that it’s engaging and relevant and supports learning?”

Cooper, H. (1989). Synthesis of research on homework . Educational leadership, 47 (3), 85-91.

Cooper, H. (2010). Homework’s Diminishing Returns . The New York Times .

Cooper, H., Robinson, J. C., & Patall, E. A. (2006). Does homework improve academic achievement? A synthesis of research, 1987–2003 . Review of Educational Research, 76 (1), 1-62.

Darling-Hammond, L., & Ifill-Lynch, O. (2006). If They'd Only Do Their Work! Educational Leadership, 63 (5), 8-13.

Eren, O., & Henderson, D. J. (2011). Are we wasting our children's time by giving them more homework? Economics of Education Review, 30 (5), 950-961.

Fernández-Alonso, R., Suárez-Álvarez, J., & Muñiz, J. (2015, March 16). Adolescents’ Homework Performance in Mathematics and Science: Personal Factors and Teaching Practices . Journal of Educational Psychology. Advance online publication.

OECD (2014). Does Homework Perpetuate Inequities in Education? PISA in Focus , No. 46, OECD Publishing, Paris.

Patall, E. A., Cooper, H., & Robinson, J. C. (2008). Parent involvement in homework: A research synthesis . Review of Educational Research, 78 (4), 1039-1101.

Van Voorhis, F. L. (2003). Interactive homework in middle school: Effects on family involvement and science achievement . The Journal of Educational Research, 96 (6), 323-338.

Walker, J. M., Hoover-Dempsey, K. V., Whetsel, D. R., & Green, C. L. (2004). Parental involvement in homework: A review of current research and its implications for teachers, after school program staff, and parent leaders . Cambridge, MA: Harvard Family Research Project.

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What we know about online learning and the homework gap amid the pandemic

America’s K-12 students are returning to classrooms this fall after 18 months of virtual learning at home during the COVID-19 pandemic. Some students who lacked the home internet connectivity needed to finish schoolwork during this time – an experience often called the “ homework gap ” – may continue to feel the effects this school year.

Here is what Pew Research Center surveys found about the students most likely to be affected by the homework gap and their experiences learning from home.

Children across the United States are returning to physical classrooms this fall after 18 months at home, raising questions about how digital disparities at home will affect the existing homework gap between certain groups of students.

Methodology for each Pew Research Center poll can be found at the links in the post.

With the exception of the 2018 survey, everyone who took part in the surveys is a member of the Center’s American Trends Panel (ATP), an online survey panel that is recruited through national, random sampling of residential addresses. This way nearly all U.S. adults have a chance of selection. The survey is weighted to be representative of the U.S. adult population by gender, race, ethnicity, partisan affiliation, education and other categories. Read more about the  ATP’s methodology .

The 2018 data on U.S. teens comes from a Center poll of 743 U.S. teens ages 13 to 17 conducted March 7 to April 10, 2018, using the NORC AmeriSpeak panel. AmeriSpeak is a nationally representative, probability-based panel of the U.S. household population. Randomly selected U.S. households are sampled with a known, nonzero probability of selection from the NORC National Frame, and then contacted by U.S. mail, telephone or face-to-face interviewers. Read more details about the NORC AmeriSpeak panel methodology .

Around nine-in-ten U.S. parents with K-12 children at home (93%) said their children have had some online instruction since the coronavirus outbreak began in February 2020, and 30% of these parents said it has been very or somewhat difficult for them to help their children use technology or the internet as an educational tool, according to an April 2021 Pew Research Center survey .

Gaps existed for certain groups of parents. For example, parents with lower and middle incomes (36% and 29%, respectively) were more likely to report that this was very or somewhat difficult, compared with just 18% of parents with higher incomes.

This challenge was also prevalent for parents in certain types of communities – 39% of rural residents and 33% of urban residents said they have had at least some difficulty, compared with 23% of suburban residents.

Around a third of parents with children whose schools were closed during the pandemic (34%) said that their child encountered at least one technology-related obstacle to completing their schoolwork during that time. In the April 2021 survey, the Center asked parents of K-12 children whose schools had closed at some point about whether their children had faced three technology-related obstacles. Around a quarter of parents (27%) said their children had to do schoolwork on a cellphone, 16% said their child was unable to complete schoolwork because of a lack of computer access at home, and another 14% said their child had to use public Wi-Fi to finish schoolwork because there was no reliable connection at home.

Parents with lower incomes whose children’s schools closed amid COVID-19 were more likely to say their children faced technology-related obstacles while learning from home. Nearly half of these parents (46%) said their child faced at least one of the three obstacles to learning asked about in the survey, compared with 31% of parents with midrange incomes and 18% of parents with higher incomes.

Of the three obstacles asked about in the survey, parents with lower incomes were most likely to say that their child had to do their schoolwork on a cellphone (37%). About a quarter said their child was unable to complete their schoolwork because they did not have computer access at home (25%), or that they had to use public Wi-Fi because they did not have a reliable internet connection at home (23%).

A Center survey conducted in April 2020 found that, at that time, 59% of parents with lower incomes who had children engaged in remote learning said their children would likely face at least one of the obstacles asked about in the 2021 survey.

A year into the outbreak, an increasing share of U.S. adults said that K-12 schools have a responsibility to provide all students with laptop or tablet computers in order to help them complete their schoolwork at home during the pandemic. About half of all adults (49%) said this in the spring 2021 survey, up 12 percentage points from a year earlier. An additional 37% of adults said that schools should provide these resources only to students whose families cannot afford them, and just 13% said schools do not have this responsibility.

While larger shares of both political parties in April 2021 said K-12 schools have a responsibility to provide computers to all students in order to help them complete schoolwork at home, there was a 15-point change among Republicans: 43% of Republicans and those who lean to the Republican Party said K-12 schools have this responsibility, compared with 28% last April. In the 2021 survey, 22% of Republicans also said schools do not have this responsibility at all, compared with 6% of Democrats and Democratic leaners.

Even before the pandemic, Black teens and those living in lower-income households were more likely than other groups to report trouble completing homework assignments because they did not have reliable technology access. Nearly one-in-five teens ages 13 to 17 (17%) said they are often or sometimes unable to complete homework assignments because they do not have reliable access to a computer or internet connection, a 2018 Center survey of U.S. teens found.

One-quarter of Black teens said they were at least sometimes unable to complete their homework due to a lack of digital access, including 13% who said this happened to them often. Just 4% of White teens and 6% of Hispanic teens said this often happened to them. (There were not enough Asian respondents in the survey sample to be broken out into a separate analysis.)

A wide gap also existed by income level: 24% of teens whose annual family income was less than $30,000 said the lack of a dependable computer or internet connection often or sometimes prohibited them from finishing their homework, but that share dropped to 9% among teens who lived in households earning $75,000 or more a year.

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Katherine Schaeffer is a research analyst at Pew Research Center .

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Evaluating the Role of Homework

Winter 2022

By Alison Baran

Doing Our Homework

A sign of the times, through the pandemic lens.

• Homework was never intended to make up for “learning loss”; it is a tool for reinforcement and enrichment.
• Caregivers are more overwhelmed than ever before. Many are not in the position to support children with their homework.
• Students have the right to socialize with their peers and engage in extracurricular activities that bring them happiness. During the height of the pandemic, children and teens had limited, if any, opportunities to socialize.
• More than a third (37%) of teens surveyed say their mental health has worsened throughout the pandemic, according to a study done by the Morgan Stanley Alliance for Children’s Mental Health (2021). It is important that all constituents—faculty, administrators, caregivers—have a clear understanding and shared language about the expectations around giving and receiving homework. More than ever, we need to be working together in our schools with the express purpose of putting the mental health needs of our students first.
• Children have the right to playtime, extracurricular activities, downtime, and adequate sleep.
• Teachers should assign homework with a clear sense of why it is being given.
• The purpose of the homework assignment should be articulated to the students, including the fact that a certain task might be a challenge. Research shows that when children know why they are doing the homework, they are more engaged and inspired.
• Tasks should be personally relevant to students and should allow for choices. Children are motivated when they have ownership in their learning.
• Over the course of time, the kinds of homework should vary depending on what is happening in class.
• Homework assignments better serve students when they feel competent and confident with the material being assigned.
• Children deserve feedback about the homework that they have completed.
• Teachers should differentiate for individual needs across all grade levels. This might mean adjusting number of math facts, amount of reading, etc.
• Parents have the right to control their child’s time outside of school without being judged.
• If you have doubts about whether the assignment will further learning, consider that the default might be to have no homework, or think about conducting an experiment of not doing homework for a set period of time.

Readings and Resources

• The Battle Over Homework: Common Ground for Administrators, Teachers, and Parents by Harris Cooper
• The Homework Myth: Why Our Kids Get Too Much of a Bad Thing by Alfie Kohn
• Rethinking Homework: Best Practices that Support Diverse Needs by Cathy Vatterott
• “ The Case for (Quality) Homework ,” by Janine Bempechat, Education Next , Winter 2019
• “ The Lost Cause of Homework Reform ,” by Brian Gill and Steven Schlossman, American Journal of Education , November 2000
• “ New York School District Weighs Banning Homework ,” by Alexa Lardieri, U.S. News & World Report , May 31, 2018
• “ Why this superintendent is banning homework—and asking kids to read instead ,” by Valerie Strauss, The Washington Post , July 17, 2017

Alison Baran is a fourth grade teacher at The Park School of Baltimore in Maryland. She’s also the lower school new faculty coordinator.

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Students' Achievement and Homework Assignment Strategies

Rubén fernández-alonso.

1 Department of Education Sciences, University of Oviedo, Oviedo, Spain

2 Department of Education, Principality of Asturias Government, Oviedo, Spain

Marcos Álvarez-Díaz

Javier suárez-Álvarez.

3 Department of Psychology, University of Oviedo, Oviedo, Spain

José Muñiz

The optimum time students should spend on homework has been widely researched although the results are far from unanimous. The main objective of this research is to analyze how homework assignment strategies in schools affect students' academic performance and the differences in students' time spent on homework. Participants were a representative sample of Spanish adolescents ( N = 26,543) with a mean age of 14.4 (±0.75), 49.7% girls. A test battery was used to measure academic performance in four subjects: Spanish, Mathematics, Science, and Citizenship. A questionnaire allowed the measurement of the indicators used for the description of homework and control variables. Two three-level hierarchical-linear models (student, school, autonomous community) were produced for each subject being evaluated. The relationship between academic results and homework time is negative at the individual level but positive at school level. An increase in the amount of homework a school assigns is associated with an increase in the differences in student time spent on homework. An optimum amount of homework is proposed which schools should assign to maximize gains in achievement for students overall.

The role of homework in academic achievement is an age-old debate (Walberg et al., 1985 ) that has swung between times when it was thought to be a tool for improving a country's competitiveness and times when it was almost outlawed. So Cooper ( 2001 ) talks about the battle over homework and the debates and rows continue (Walberg et al., 1985 , 1986 ; Barber, 1986 ). It is considered a complicated subject (Corno, 1996 ), mysterious (Trautwein and Köller, 2003 ), a chameleon (Trautwein et al., 2009b ), or Janus-faced (Flunger et al., 2015 ). One must agree with Cooper et al. ( 2006 ) that homework is a practice full of contradictions, where positive and negative effects coincide. As such, depending on our preferences, it is possible to find data which support the argument that homework benefits all students (Cooper, 1989 ), or that it does not matter and should be abolished (Barber, 1986 ). Equally, one might argue a compensatory effect as it favors students with more difficulties (Epstein and Van Voorhis, 2001 ), or on the contrary, that it is a source of inequality as it specifically benefits those better placed on the social ladder (Rømming, 2011 ). Furthermore, this issue has jumped over the school wall and entered the home, contributing to the polemic by becoming a common topic about which it is possible to have an opinion without being well informed, something that Goldstein ( 1960 ) warned of decades ago after reviewing almost 300 pieces of writing on the topic in Education Index and finding that only 6% were empirical studies.

The relationship between homework time and educational outcomes has traditionally been the most researched aspect (Cooper, 1989 ; Cooper et al., 2006 ; Fan et al., 2017 ), although conclusions have evolved over time. The first experimental studies (Paschal et al., 1984 ) worked from the hypothesis that time spent on homework was a reflection of an individual student's commitment and diligence and as such the relationship between time spent on homework and achievement should be positive. This was roughly the idea at the end of the twentieth century, when more positive effects had been found than negative (Cooper, 1989 ), although it was also known that the relationship was not strictly linear (Cooper and Valentine, 2001 ), and that its strength depended on the student's age- stronger in post-compulsory secondary education than in compulsory education and almost zero in primary education (Cooper et al., 2012 ). With the turn of the century, hierarchical-linear models ran counter to this idea by showing that homework was a multilevel situation and the effect of homework on outcomes depended on classroom factors (e.g., frequency or amount of assigned homework) more than on an individual's attitude (Trautwein and Köller, 2003 ). Research with a multilevel approach indicated that individual variations in time spent had little effect on academic results (Farrow et al., 1999 ; De Jong et al., 2000 ; Dettmers et al., 2010 ; Murillo and Martínez-Garrido, 2013 ; Fernández-Alonso et al., 2014 ; Núñez et al., 2014 ; Servicio de Evaluación Educativa del Principado de Asturias, 2016 ) and that when statistically significant results were found, the effect was negative (Trautwein, 2007 ; Trautwein et al., 2009b ; Lubbers et al., 2010 ; Chang et al., 2014 ). The reasons for this null or negative relationship lie in the fact that those variables which are positively associated with homework time are antagonistic when predicting academic performance. For example, some students may not need to spend much time on homework because they learn quickly and have good cognitive skills and previous knowledge (Trautwein, 2007 ; Dettmers et al., 2010 ), or maybe because they are not very persistent in their work and do not finish homework tasks (Flunger et al., 2015 ). Similarly, students may spend more time on homework because they have difficulties learning and concentrating, low expectations and motivation or because they need more direct help (Trautwein et al., 2006 ), or maybe because they put in a lot of effort and take a lot of care with their work (Flunger et al., 2015 ). Something similar happens with sociological variables such as gender: Girls spend more time on homework (Gershenson and Holt, 2015 ) but, compared to boys, in standardized tests they have better results in reading and worse results in Science and Mathematics (OECD, 2013a ).

On the other hand, thanks to multilevel studies, systematic effects on performance have been found when homework time is considered at the class or school level. De Jong et al. ( 2000 ) found that the number of assigned homework tasks in a year was positively and significantly related to results in mathematics. Equally, the volume or amount of homework (mean homework time for the group) and the frequency of homework assignment have positive effects on achievement. The data suggests that when frequency and volume are considered together, the former has more impact on results than the latter (Trautwein et al., 2002 ; Trautwein, 2007 ). In fact, it has been estimated that in classrooms where homework is always assigned there are gains in mathematics and science of 20% of a standard deviation over those classrooms which sometimes assign homework (Fernández-Alonso et al., 2015 ). Significant results have also been found in research which considered only homework volume at the classroom or school level. Dettmers et al. ( 2009 ) concluded that the school-level effect of homework is positive in the majority of participating countries in PISA 2003, and the OECD ( 2013b ), with data from PISA 2012, confirms that schools in which students have more weekly homework demonstrate better results once certain school and student-background variables are discounted. To put it briefly, homework has a multilevel nature (Trautwein and Köller, 2003 ) in which the variables have different significance and effects according to the level of analysis, in this case a positive effect at class level, and a negative or null effect in most cases at the level of the individual. Furthermore, the fact that the clearest effects are seen at the classroom and school level highlights the role of homework policy in schools and teaching, over and above the time individual students spend on homework.

From this complex context, this current study aims to explore the relationships between the strategies schools use to assign homework and the consequences that has on students' academic performance and on the students' own homework strategies. There are two specific objectives, firstly, to systematically analyze the differential effect of time spent on homework on educational performance, both at school and individual level. We hypothesize a positive effect for homework time at school level, and a negative effect at the individual level. Secondly, the influence of homework quantity assigned by schools on the distribution of time spent by students on homework will be investigated. This will test the previously unexplored hypothesis that an increase in the amount of homework assigned by each school will create an increase in differences, both in time spent on homework by the students, and in academic results. Confirming this hypothesis would mean that an excessive amount of homework assigned by schools would penalize those students who for various reasons (pace of work, gaps in learning, difficulties concentrating, overexertion) need to spend more time completing their homework than their peers. In order to resolve this apparent paradox we will calculate the optimum volume of homework that schools should assign in order to benefit the largest number of students without contributing to an increase in differences, that is, without harming educational equity.

Participants

The population was defined as those students in year 8 of compulsory education in the academic year 2009/10 in Spain. In order to provide a representative sample, a stratified random sampling was carried out from the 19 autonomous regions in Spain. The sample was selected from each stratum according to a two-stage cluster design (OECD, 2009 , 2011 , 2014a ; Ministerio de Educación, 2011 ). In the first stage, the primary units of the sample were the schools, which were selected with a probability proportional to the number of students in the 8th grade. The more 8th grade students in a given school, the higher the likelihood of the school being selected. In the second stage, 35 students were selected from each school through simple, systematic sampling. A detailed, step-by-step description of the sampling procedure may be found in OECD ( 2011 ). The subsequent sample numbered 29,153 students from 933 schools. Some students were excluded due to lack of information (absences on the test day), or for having special educational needs. The baseline sample was finally made up of 26,543 students. The mean student age was 14.4 with a standard deviation of 0.75, rank of age from 13 to 16. Some 66.2% attended a state school; 49.7% were girls; 87.8% were Spanish nationals; 73.5% were in the school year appropriate to their age, the remaining 26.5% were at least 1 year behind in terms of their age.

Test application, marking, and data recording were contracted out via public tendering, and were carried out by qualified personnel unconnected to the schools. The evaluation, was performed on two consecutive days, each day having two 50 min sessions separated by a break. At the end of the second day the students completed a context questionnaire which included questions related to homework. The evaluation was carried out in compliance with current ethical standards in Spain. Families of the students selected to participate in the evaluation were informed about the study by the school administrations, and were able to choose whether those students would participate in the study or not.

Instruments

Tests of academic performance.

The performance test battery consisted of 342 items evaluating four subjects: Spanish (106 items), mathematics (73 items), science (78), and citizenship (85). The items, completed on paper, were in various formats and were subject to binary scoring, except 21 items which were coded on a polytomous scale, between 0 and 2 points (Ministerio de Educación, 2011 ). As a single student is not capable of answering the complete item pool in the time given, the items were distributed across various booklets following a matrix design (Fernández-Alonso and Muñiz, 2011 ). The mean Cronbach α for the booklets ranged from 0.72 (mathematics) to 0.89 (Spanish). Student scores were calculated adjusting the bank of items to Rasch's IRT model using the ConQuest 2.0 program (Wu et al., 2007 ) and were expressed in a scale with mean and standard deviation of 500 and 100 points respectively. The student's scores were divided into five categories, estimated using the plausible values method. In large scale assessments this method is better at recovering the true population parameters (e.g., mean, standard deviation) than estimates of scores using methods of maximum likelihood or expected a-posteriori estimations (Mislevy et al., 1992 ; OECD, 2009 ; von Davier et al., 2009 ).

Homework variables

A questionnaire was made up of a mix of items which allowed the calculation of the indicators used for the description of homework variables. Daily minutes spent on homework was calculated from a multiple choice question with the following options: (a) Generally I don't have homework; (b) 1 h or less; (c) Between 1 and 2 h; (d) Between 2 and 3 h; (e) More than 3 h. The options were recoded as follows: (a) = 0 min.; (b) = 45 min.; (c) = 90 min.; (d) = 150 min.; (e) = 210 min. According to Trautwein and Köller ( 2003 ) the average homework time of the students in a school could be regarded as a good proxy for the amount of homework assigned by the teacher. So the mean of this variable for each school was used as an estimator of Amount or volume of homework assigned .

Control variables

Four variables were included to describe sociological factors about the students, three were binary: Gender (1 = female ); Nationality (1 = Spanish; 0 = other ); School type (1 = state school; 0 = private ). The fourth variable was Socioeconomic and cultural index (SECI), which is constructed with information about family qualifications and professions, along with the availability of various material and cultural resources at home. It is expressed in standardized points, N(0,1) . Three variables were used to gather educational history: Appropriate School Year (1 = being in the school year appropriate to their age ; 0 = repeated a school year) . The other two adjustment variables were Academic Expectations and Motivation which were included for two reasons: they are both closely connected to academic achievement (Suárez-Álvarez et al., 2014 ). Their position as adjustment factors is justified because, in an ex-post facto descriptive design such as this, both expectations and motivation may be thought of as background variables that the student brings with them on the day of the test. Academic expectations for finishing education was measured with a multiple-choice item where the score corresponds to the years spent in education in order to reach that level of qualification: compulsory secondary education (10 points); further secondary education (12 points); non-university higher education (14 points); University qualification (16 points). Motivation was constructed from the answers to six four-point Likert items, where 1 means strongly disagree with the sentence and 4 means strongly agree. Students scoring highly in this variable are agreeing with statements such as “at school I learn useful and interesting things.” A Confirmatory Factor Analysis was performed using a Maximum Likelihood robust estimation method (MLMV) and the items fit an essentially unidimensional scale: CFI = 0.954; TLI = 0.915; SRMR = 0.037; RMSEA = 0.087 (90% CI = 0.084–0.091).

As this was an official evaluation, the tests used were created by experts in the various fields, contracted by the Spanish Ministry of Education in collaboration with the regional education authorities.

Data analyses

Firstly the descriptive statistics and Pearson correlations between the variables were calculated. Then, using the HLM 6.03 program (Raudenbush et al., 2004 ), two three-level hierarchical-linear models (student, school, autonomous community) were produced for each subject being evaluated: a null model (without predictor variables) and a random intercept model in which adjustment variables and homework variables were introduced at the same time. Given that HLM does not return standardized coefficients, all of the variables were standardized around the general mean, which allows the interpretation of the results as classical standardized regression analysis coefficients. Levels 2 and 3 variables were constructed from means of standardized level 1 variables and were not re-standardized. Level 1 variables were introduced without centering except for four cases: study time, motivation, expectation, and socioeconomic and cultural level which were centered on the school mean to control composition effects (Xu and Wu, 2013 ) and estimate the effect of differences in homework time among the students within the same school. The range of missing variable cases was very small, between 1 and 3%. Recovery was carried out using the procedure described in Fernández-Alonso et al. ( 2012 ).

The results are presented in two ways: the tables show standardized coefficients while in the figures the data are presented in a real scale, taking advantage of the fact that a scale with a 100 point standard deviation allows the expression of the effect of the variables and the differences between groups as percentage increases in standardized points.

Table ​ Table1 1 shows the descriptive statistics and the matrix of correlations between the study variables. As can be seen in the table, the relationship between the variables turned out to be in the expected direction, with the closest correlations between the different academic performance scores and socioeconomic level, appropriate school year, and student expectations. The nationality variable gave the highest asymmetry and kurtosis, which was to be expected as the majority of the sample are Spanish.

Descriptive statistics and Pearson correlation matrix between the variables .

Table ​ Table2 2 shows the distribution of variance in the null model. In the four subjects taken together, 85% of the variance was found at the student level, 10% was variance between schools, and 5% variance between regions. Although the 10% of variance between schools could seem modest, underlying that there were large differences. For example, in Spanish the 95% plausible value range for the school means ranged between 577 and 439 points, practically 1.5 standard deviations, which shows that schools have a significant impact on student results.

Distribution of the variance in the null model .

Table ​ Table3 3 gives the standardized coefficients of the independent variables of the four multilevel models, as well as the percentage of variance explained by each level.

Multilevel models for prediction of achievement in four subjects .

β, Standardized weight; SE, Standard Error; SECI, Socioeconomic and cultural index; AC, Autonomous Communities .

The results indicated that the adjustment variables behaved satisfactorily, with enough control to analyze the net effects of the homework variables. This was backed up by two results, firstly, the two variables with highest standardized coefficients were those related to educational history: academic expectations at the time of the test, and being in the school year corresponding to age. Motivation demonstrated a smaller effect but one which was significant in all cases. Secondly, the adjustment variables explained the majority of the variance in the results. The percentages of total explained variance in Table ​ Table2 2 were calculated with all variables. However, if the strategy had been to introduce the adjustment variables first and then add in the homework variables, the explanatory gain in the second model would have been about 2% in each subject.

The amount of homework turned out to be positively and significantly associated with the results in the four subjects. In a 100 point scale of standard deviation, controlling for other variables, it was estimated that for each 10 min added to the daily volume of homework, schools would achieve between 4.1 and 4.8 points more in each subject, with the exception of mathematics where the increase would be around 2.5 points. In other words, an increase of between 15 and 29 points in the school mean is predicted for each additional hour of homework volume of the school as a whole. This school level gain, however, would only occur if the students spent exactly the same time on homework as their school mean. As the regression coefficient of student homework time is negative and the variable is centered on the level of the school, the model predicts deterioration in results for those students who spend more time than their class mean on homework, and an improvement for those who finish their homework more quickly than the mean of their classmates.

Furthermore, the results demonstrated a positive association between the amount of homework assigned in a school and the differences in time needed by the students to complete their homework. Figure ​ Figure1 1 shows the relationship between volume of homework (expressed as mean daily minutes of homework by school) and the differences in time spent by students (expressed as the standard deviation from the mean school daily minutes). The correlation between the variables was 0.69 and the regression gradient indicates that schools which assigned 60 min of homework per day had a standard deviation in time spent by students on homework of approximately 25 min, whereas in those schools assigning 120 min of homework, the standard deviation was twice as long, and was over 50 min. So schools which assigned more homework also tended to demonstrate greater differences in the time students need to spend on that homework.

Relationship between school homework volume and differences in time needed by students to complete homework .

Figure ​ Figure2 2 shows the effect on results in mathematics of the combination of homework time, homework amount, and the variance of homework time associated with the amount of homework assigned in two types of schools: in type 1 schools the amount of homework assigned is 1 h, and in type 2 schools the amount of homework 2 h. The result in mathematics was used as a dependent variable because, as previously noted, it was the subject where the effect was smallest and as such is the most conservative prediction. With other subjects the results might be even clearer.

Prediction of results for quick and slow students according to school homework size .

Looking at the first standard deviation of student homework time shown in the first graph, it was estimated that in type 1 schools, which assign 1 h of daily homework, a quick student (one who finishes their homework before 85% of their classmates) would spend a little over half an hour (35 min), whereas the slower student, who spends more time than 85% of classmates, would need almost an hour and a half of work each day (85 min). In type 2 schools, where the homework amount is 2 h a day, the differences increase from just over an hour (65 min for a quick student) to almost 3 h (175 min for a slow student). Figure ​ Figure2 2 shows how the differences in performance would vary within a school between the more and lesser able students according to amount of homework assigned. In type 1 schools, with 1 h of homework per day, the difference in achievement between quick and slow students would be around 5% of a standard deviation, while in schools assigning 2 h per day the difference would be 12%. On the other hand, the slow student in a type 2 school would score 6 points more than the quick student in a type 1 school. However, to achieve this, the slow student in a type 2 school would need to spend five times as much time on homework in a week (20.4 weekly hours rather than 4.1). It seems like a lot of work for such a small gain.

Discussion and conclusions

The data in this study reaffirm the multilevel nature of homework (Trautwein and Köller, 2003 ) and support this study's first hypothesis: the amount of homework (mean daily minutes the student spends on homework) is positively associated with academic results, whereas the time students spent on homework considered individually is negatively associated with academic results. These findings are in line with previous research, which indicate that school-level variables, such as amount of homework assigned, have more explanatory power than individual variables such as time spent (De Jong et al., 2000 ; Dettmers et al., 2010 ; Scheerens et al., 2013 ; Fernández-Alonso et al., 2015 ). In this case it was found that for each additional hour of homework assigned by a school, a gain of 25% of a standard deviation is expected in all subjects except mathematics, where the gain is around 15%. On the basis of this evidence, common sense would dictate the conclusion that frequent and abundant homework assignment may be one way to improve school efficiency.

However, as noted previously, the relationship between homework and achievement is paradoxical- appearances are deceptive and first conclusions are not always confirmed. Analysis demonstrates another two complementary pieces of data which, read together, raise questions about the previous conclusion. In the first place, time spent on homework at the individual level was found to have a negative effect on achievement, which confirms the findings of other multilevel-approach research (Trautwein, 2007 ; Trautwein et al., 2009b ; Chang et al., 2014 ; Fernández-Alonso et al., 2016 ). Furthermore, it was found that an increase in assigned homework volume is associated with an increase in the differences in time students need to complete it. Taken together, the conclusion is that, schools with more homework tend to exhibit more variation in student achievement. These results seem to confirm our second hypothesis, as a positive covariation was found between the amount of homework in a school (the mean homework time by school) and the increase in differences within the school, both in student homework time and in the academic results themselves. The data seem to be in line with those who argue that homework is a source of inequity because it affects those less academically-advantaged students and students with greater limitations in their home environments (Kohn, 2006 ; Rømming, 2011 ; OECD, 2013b ).

This new data has clear implications for educational action and school homework policies, especially in compulsory education. If quality compulsory education is that which offers the best results for the largest number (Barber and Mourshed, 2007 ; Mourshed et al., 2010 ), then assigning an excessive volume of homework at those school levels could accentuate differences, affecting students who are slower, have more gaps in their knowledge, or are less privileged, and can make them feel overwhelmed by the amount of homework assigned to them (Martinez, 2011 ; OECD, 2014b ; Suárez et al., 2016 ). The data show that in a school with 60 min of assigned homework, a quick student will need just 4 h a week to finish their homework, whereas a slow student will spend 10 h a week, 2.5 times longer, with the additional aggravation of scoring one twentieth of a standard deviation below their quicker classmates. And in a school assigning 120 min of homework per day, a quick student will need 7.5 h per week whereas a slow student will have to triple this time (20 h per week) to achieve a result one eighth worse, that is, more time for a relatively worse result.

It might be argued that the differences are not very large, as between 1 and 2 h of assigned homework, the level of inequality increases 7% on a standardized scale. But this percentage increase has been estimated after statistically, or artificially, accounting for sociological and psychological student factors and other variables at school and region level. The adjustment variables influence both achievement and time spent on homework, so it is likely that in a real classroom situation the differences estimated here might be even larger. This is especially important in comprehensive education systems, like the Spanish (Eurydice, 2015 ), in which the classroom groups are extremely heterogeneous, with a variety of students in the same class in terms of ability, interest, and motivation, in which the aforementioned variables may operate more strongly.

The results of this research must be interpreted bearing in mind a number of limitations. The most significant limitation in the research design is the lack of a measure of previous achievement, whether an ad hoc test (Murillo and Martínez-Garrido, 2013 ) or school grades (Núñez et al., 2014 ), which would allow adjustment of the data. In an attempt to alleviate this, our research has placed special emphasis on the construction of variables which would work to exclude academic history from the model. The use of the repetition of school year variable was unavoidable because Spain has one of the highest levels of repetition in the European Union (Eurydice, 2011 ) and repeating students achieve worse academic results (Ministerio de Educación, 2011 ). Similarly, the expectation and motivation variables were included in the group of adjustment factors assuming that in this research they could be considered background variables. In this way, once the background factors are discounted, the homework variables explain 2% of the total variance, which is similar to estimations from other multilevel studies (De Jong et al., 2000 ; Trautwein, 2007 ; Dettmers et al., 2009 ; Fernández-Alonso et al., 2016 ). On the other hand, the statistical models used to analyze the data are correlational, and as such, one can only speak of an association between variables and not of directionality or causality in the analysis. As Trautwein and Lüdtke ( 2009 ) noted, the word “effect” must be understood as “predictive effect.” In other words, it is possible to say that the amount of homework is connected to performance; however, it is not possible to say in which direction the association runs. Another aspect to be borne in mind is that the homework time measures are generic -not segregated by subject- when it its understood that time spent and homework behavior are not consistent across all subjects (Trautwein et al., 2006 ; Trautwein and Lüdtke, 2007 ). Nonetheless, when the dependent variable is academic results it has been found that the relationship between homework time and achievement is relatively stable across all subjects (Lubbers et al., 2010 ; Chang et al., 2014 ) which leads us to believe that the results given here would have changed very little even if the homework-related variables had been separated by subject.

Future lines of research should be aimed toward the creation of comprehensive models which incorporate a holistic vision of homework. It must be recognized that not all of the time spent on homework by a student is time well spent (Valle et al., 2015 ). In addition, research has demonstrated the importance of other variables related to student behavior such as rate of completion, the homework environment, organization, and task management, autonomy, parenting styles, effort, and the use of study techniques (Zimmerman and Kitsantas, 2005 ; Xu, 2008 , 2013 ; Kitsantas and Zimmerman, 2009 ; Kitsantas et al., 2011 ; Ramdass and Zimmerman, 2011 ; Bembenutty and White, 2013 ; Xu and Wu, 2013 ; Xu et al., 2014 ; Rosário et al., 2015a ; Osorio and González-Cámara, 2016 ; Valle et al., 2016 ), as well as the role of expectation, value given to the task, and personality traits (Lubbers et al., 2010 ; Goetz et al., 2012 ; Pedrosa et al., 2016 ). Along the same lines, research has also indicated other important variables related to teacher homework policies, such as reasons for assignment, control and feedback, assignment characteristics, and the adaptation of tasks to the students' level of learning (Trautwein et al., 2009a ; Dettmers et al., 2010 ; Patall et al., 2010 ; Buijs and Admiraal, 2013 ; Murillo and Martínez-Garrido, 2013 ; Rosário et al., 2015b ). All of these should be considered in a comprehensive model of homework.

In short, the data seem to indicate that in year 8 of compulsory education, 60–70 min of homework a day is a recommendation that, slightly more optimistically than Cooper's ( 2001 ) “10 min rule,” gives a reasonable gain for the whole school, without exaggerating differences or harming students with greater learning difficulties or who work more slowly, and is in line with other available evidence (Fernández-Alonso et al., 2015 ). These results have significant implications when it comes to setting educational policy in schools, sending a clear message to head teachers, teachers and those responsible for education. The results of this research show that assigning large volumes of homework increases inequality between students in pursuit of minimal gains in achievement for those who least need it. Therefore, in terms of school efficiency, and with the aim of improving equity in schools it is recommended that educational policies be established which optimize all students' achievement.

Ethics statement

This study was carried out in accordance with the recommendations of the University of Oviedo with written informed consent from all subjects. All subjects gave written informed consent in accordance with the Declaration of Helsinki. The protocol was approved by the University of Oviedo.

Author contributions

RF and JM have designed the research; RF and JS have analyzed the data; MA and JM have interpreted the data; RF, MA, and JS have drafted the paper; JM has revised it critically; all authors have provided final approval of the version to be published and have ensured the accuracy and integrity of the work.

This research was funded by the Ministerio de Economía y Competitividad del Gobierno de España. References: PSI2014-56114-P, BES2012-053488. We would like to express our utmost gratitude to the Ministerio de Educación Cultura y Deporte del Gobierno de España and to the Consejería de Educación y Cultura del Gobierno del Principado de Asturias, without whose collaboration this research would not have been possible.

Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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Is homework a necessary evil?

After decades of debate, researchers are still sorting out the truth about homework’s pros and cons. One point they can agree on: Quality assignments matter.

By Kirsten Weir

March 2016, Vol 47, No. 3

Print version: page 36

• Schools and Classrooms

Homework battles have raged for decades. For as long as kids have been whining about doing their homework, parents and education reformers have complained that homework's benefits are dubious. Meanwhile many teachers argue that take-home lessons are key to helping students learn. Now, as schools are shifting to the new (and hotly debated) Common Core curriculum standards, educators, administrators and researchers are turning a fresh eye toward the question of homework's value.

But when it comes to deciphering the research literature on the subject, homework is anything but an open book.

The 10-minute rule

In many ways, homework seems like common sense. Spend more time practicing multiplication or studying Spanish vocabulary and you should get better at math or Spanish. But it may not be that simple.

Homework can indeed produce academic benefits, such as increased understanding and retention of the material, says Duke University social psychologist Harris Cooper, PhD, one of the nation's leading homework researchers. But not all students benefit. In a review of studies published from 1987 to 2003, Cooper and his colleagues found that homework was linked to better test scores in high school and, to a lesser degree, in middle school. Yet they found only faint evidence that homework provided academic benefit in elementary school ( Review of Educational Research , 2006).

Then again, test scores aren't everything. Homework proponents also cite the nonacademic advantages it might confer, such as the development of personal responsibility, good study habits and time-management skills. But as to hard evidence of those benefits, "the jury is still out," says Mollie Galloway, PhD, associate professor of educational leadership at Lewis & Clark College in Portland, Oregon. "I think there's a focus on assigning homework because [teachers] think it has these positive outcomes for study skills and habits. But we don't know for sure that's the case."

Even when homework is helpful, there can be too much of a good thing. "There is a limit to how much kids can benefit from home study," Cooper says. He agrees with an oft-cited rule of thumb that students should do no more than 10 minutes a night per grade level — from about 10 minutes in first grade up to a maximum of about two hours in high school. Both the National Education Association and National Parent Teacher Association support that limit.

Beyond that point, kids don't absorb much useful information, Cooper says. In fact, too much homework can do more harm than good. Researchers have cited drawbacks, including boredom and burnout toward academic material, less time for family and extracurricular activities, lack of sleep and increased stress.

In a recent study of Spanish students, Rubén Fernández-Alonso, PhD, and colleagues found that students who were regularly assigned math and science homework scored higher on standardized tests. But when kids reported having more than 90 to 100 minutes of homework per day, scores declined ( Journal of Educational Psychology , 2015).

"At all grade levels, doing other things after school can have positive effects," Cooper says. "To the extent that homework denies access to other leisure and community activities, it's not serving the child's best interest."

Children of all ages need down time in order to thrive, says Denise Pope, PhD, a professor of education at Stanford University and a co-founder of Challenge Success, a program that partners with secondary schools to implement policies that improve students' academic engagement and well-being.

"Little kids and big kids need unstructured time for play each day," she says. Certainly, time for physical activity is important for kids' health and well-being. But even time spent on social media can help give busy kids' brains a break, she says.

All over the map

But are teachers sticking to the 10-minute rule? Studies attempting to quantify time spent on homework are all over the map, in part because of wide variations in methodology, Pope says.

A 2014 report by the Brookings Institution examined the question of homework, comparing data from a variety of sources. That report cited findings from a 2012 survey of first-year college students in which 38.4 percent reported spending six hours or more per week on homework during their last year of high school. That was down from 49.5 percent in 1986 ( The Brown Center Report on American Education , 2014).

The Brookings report also explored survey data from the National Assessment of Educational Progress, which asked 9-, 13- and 17-year-old students how much homework they'd done the previous night. They found that between 1984 and 2012, there was a slight increase in homework for 9-year-olds, but homework amounts for 13- and 17-year-olds stayed roughly the same, or even decreased slightly.

Yet other evidence suggests that some kids might be taking home much more work than they can handle. Robert Pressman, PhD, and colleagues recently investigated the 10-minute rule among more than 1,100 students, and found that elementary-school kids were receiving up to three times as much homework as recommended. As homework load increased, so did family stress, the researchers found ( American Journal of Family Therapy , 2015).

Many high school students also seem to be exceeding the recommended amounts of homework. Pope and Galloway recently surveyed more than 4,300 students from 10 high-achieving high schools. Students reported bringing home an average of just over three hours of homework nightly ( Journal of Experiential Education , 2013).

On the positive side, students who spent more time on homework in that study did report being more behaviorally engaged in school — for instance, giving more effort and paying more attention in class, Galloway says. But they were not more invested in the homework itself. They also reported greater academic stress and less time to balance family, friends and extracurricular activities. They experienced more physical health problems as well, such as headaches, stomach troubles and sleep deprivation. "Three hours per night is too much," Galloway says.

In the high-achieving schools Pope and Galloway studied, more than 90 percent of the students go on to college. There's often intense pressure to succeed academically, from both parents and peers. On top of that, kids in these communities are often overloaded with extracurricular activities, including sports and clubs. "They're very busy," Pope says. "Some kids have up to 40 hours a week — a full-time job's worth — of extracurricular activities." And homework is yet one more commitment on top of all the others.

"Homework has perennially acted as a source of stress for students, so that piece of it is not new," Galloway says. "But especially in upper-middle-class communities, where the focus is on getting ahead, I think the pressure on students has been ratcheted up."

Yet homework can be a problem at the other end of the socioeconomic spectrum as well. Kids from wealthier homes are more likely to have resources such as computers, Internet connections, dedicated areas to do schoolwork and parents who tend to be more educated and more available to help them with tricky assignments. Kids from disadvantaged homes are more likely to work at afterschool jobs, or to be home without supervision in the evenings while their parents work multiple jobs, says Lea Theodore, PhD, a professor of school psychology at the College of William and Mary in Williamsburg, Virginia. They are less likely to have computers or a quiet place to do homework in peace.

"Homework can highlight those inequities," she says.

Quantity vs. quality

One point researchers agree on is that for all students, homework quality matters. But too many kids are feeling a lack of engagement with their take-home assignments, many experts say. In Pope and Galloway's research, only 20 percent to 30 percent of students said they felt their homework was useful or meaningful.

"Students are assigned a lot of busywork. They're naming it as a primary stressor, but they don't feel it's supporting their learning," Galloway says.

"Homework that's busywork is not good for anyone," Cooper agrees. Still, he says, different subjects call for different kinds of assignments. "Things like vocabulary and spelling are learned through practice. Other kinds of courses require more integration of material and drawing on different skills."

But critics say those skills can be developed with many fewer hours of homework each week. Why assign 50 math problems, Pope asks, when 10 would be just as constructive? One Advanced Placement biology teacher she worked with through Challenge Success experimented with cutting his homework assignments by a third, and then by half. "Test scores didn't go down," she says. "You can have a rigorous course and not have a crazy homework load."

Still, changing the culture of homework won't be easy. Teachers-to-be get little instruction in homework during their training, Pope says. And despite some vocal parents arguing that kids bring home too much homework, many others get nervous if they think their child doesn't have enough. "Teachers feel pressured to give homework because parents expect it to come home," says Galloway. "When it doesn't, there's this idea that the school might not be doing its job."

Galloway argues teachers and school administrators need to set clear goals when it comes to homework — and parents and students should be in on the discussion, too. "It should be a broader conversation within the community, asking what's the purpose of homework? Why are we giving it? Who is it serving? Who is it not serving?"

Until schools and communities agree to take a hard look at those questions, those backpacks full of take-home assignments will probably keep stirring up more feelings than facts.

Further reading

• Cooper, H., Robinson, J. C., & Patall, E. A. (2006). Does homework improve academic achievement? A synthesis of research, 1987-2003. Review of Educational Research, 76 (1), 1–62. doi: 10.3102/00346543076001001
• Galloway, M., Connor, J., & Pope, D. (2013). Nonacademic effects of homework in privileged, high-performing high schools. The Journal of Experimental Education, 81 (4), 490–510. doi: 10.1080/00220973.2012.745469
• Pope, D., Brown, M., & Miles, S. (2015). Overloaded and underprepared: Strategies for stronger schools and healthy, successful kids . San Francisco, CA: Jossey-Bass.

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Credit: August de Richelieu

Does homework still have value? A Johns Hopkins education expert weighs in

Joyce epstein, co-director of the center on school, family, and community partnerships, discusses why homework is essential, how to maximize its benefit to learners, and what the 'no-homework' approach gets wrong.

By Vicky Hallett

The necessity of homework has been a subject of debate since at least as far back as the 1890s, according to Joyce L. Epstein , co-director of the Center on School, Family, and Community Partnerships at Johns Hopkins University. "It's always been the case that parents, kids—and sometimes teachers, too—wonder if this is just busy work," Epstein says.

But after decades of researching how to improve schools, the professor in the Johns Hopkins School of Education remains certain that homework is essential—as long as the teachers have done their homework, too. The National Network of Partnership Schools , which she founded in 1995 to advise schools and districts on ways to improve comprehensive programs of family engagement, has developed hundreds of improved homework ideas through its Teachers Involve Parents in Schoolwork program. For an English class, a student might interview a parent on popular hairstyles from their youth and write about the differences between then and now. Or for science class, a family could identify forms of matter over the dinner table, labeling foods as liquids or solids. These innovative and interactive assignments not only reinforce concepts from the classroom but also foster creativity, spark discussions, and boost student motivation.

"We're not trying to eliminate homework procedures, but expand and enrich them," says Epstein, who is packing this research into a forthcoming book on the purposes and designs of homework. In the meantime, the Hub couldn't wait to ask her some questions:

What kind of homework training do teachers typically get?

Future teachers and administrators really have little formal training on how to design homework before they assign it. This means that most just repeat what their teachers did, or they follow textbook suggestions at the end of units. For example, future teachers are well prepared to teach reading and literacy skills at each grade level, and they continue to learn to improve their teaching of reading in ongoing in-service education. By contrast, most receive little or no training on the purposes and designs of homework in reading or other subjects. It is really important for future teachers to receive systematic training to understand that they have the power, opportunity, and obligation to design homework with a purpose.

Why do students need more interactive homework?

If homework assignments are always the same—10 math problems, six sentences with spelling words—homework can get boring and some kids just stop doing their assignments, especially in the middle and high school years. When we've asked teachers what's the best homework you've ever had or designed, invariably we hear examples of talking with a parent or grandparent or peer to share ideas. To be clear, parents should never be asked to "teach" seventh grade science or any other subject. Rather, teachers set up the homework assignments so that the student is in charge. It's always the student's homework. But a good activity can engage parents in a fun, collaborative way. Our data show that with "good" assignments, more kids finish their work, more kids interact with a family partner, and more parents say, "I learned what's happening in the curriculum." It all works around what the youngsters are learning.

Is family engagement really that important?

At Hopkins, I am part of the Center for Social Organization of Schools , a research center that studies how to improve many aspects of education to help all students do their best in school. One thing my colleagues and I realized was that we needed to look deeply into family and community engagement. There were so few references to this topic when we started that we had to build the field of study. When children go to school, their families "attend" with them whether a teacher can "see" the parents or not. So, family engagement is ever-present in the life of a school.

My daughter's elementary school doesn't assign homework until third grade. What's your take on "no homework" policies?

There are some parents, writers, and commentators who have argued against homework, especially for very young children. They suggest that children should have time to play after school. This, of course is true, but many kindergarten kids are excited to have homework like their older siblings. If they give homework, most teachers of young children make assignments very short—often following an informal rule of 10 minutes per grade level. "No homework" does not guarantee that all students will spend their free time in productive and imaginative play.

Some researchers and critics have consistently misinterpreted research findings. They have argued that homework should be assigned only at the high school level where data point to a strong connection of doing assignments with higher student achievement . However, as we discussed, some students stop doing homework. This leads, statistically, to results showing that doing homework or spending more minutes on homework is linked to higher student achievement. If slow or struggling students are not doing their assignments, they contribute to—or cause—this "result."

Teachers need to design homework that even struggling students want to do because it is interesting. Just about all students at any age level react positively to good assignments and will tell you so.

Did COVID change how schools and parents view homework?

Within 24 hours of the day school doors closed in March 2020, just about every school and district in the country figured out that teachers had to talk to and work with students' parents. This was not the same as homeschooling—teachers were still working hard to provide daily lessons. But if a child was learning at home in the living room, parents were more aware of what they were doing in school. One of the silver linings of COVID was that teachers reported that they gained a better understanding of their students' families. We collected wonderfully creative examples of activities from members of the National Network of Partnership Schools. I'm thinking of one art activity where every child talked with a parent about something that made their family unique. Then they drew their finding on a snowflake and returned it to share in class. In math, students talked with a parent about something the family liked so much that they could represent it 100 times. Conversations about schoolwork at home was the point.

How did you create so many homework activities via the Teachers Involve Parents in Schoolwork program?

We had several projects with educators to help them design interactive assignments, not just "do the next three examples on page 38." Teachers worked in teams to create TIPS activities, and then we turned their work into a standard TIPS format in math, reading/language arts, and science for grades K-8. Any teacher can use or adapt our prototypes to match their curricula.

Overall, we know that if future teachers and practicing educators were prepared to design homework assignments to meet specific purposes—including but not limited to interactive activities—more students would benefit from the important experience of doing their homework. And more parents would, indeed, be partners in education.

Posted in Voices+Opinion

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Perceived parental involvement and student engagement with homework in secondary school: The mediating role of self-handicapping

• Published: 30 April 2021
• Volume 42 , pages 4350–4361, ( 2023 )

Cite this article

• José Carlos Núñez   ORCID: orcid.org/0000-0002-9187-1201 1 ,
• Carlos Freire   ORCID: orcid.org/0000-0002-6252-4016 2 ,
• María del Mar Ferradás   ORCID: orcid.org/0000-0002-9716-8306 2 ,
• Antonio Valle   ORCID: orcid.org/0000-0001-8160-9181 2 &
• Jianzhong Xu   ORCID: orcid.org/0000-0002-0269-4590 3 , 4  

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Research in the field of homework has confirmed the significant association between students’ perceptions of their parents’ involvement and their motivation and engagement with these tasks. In this study we analyzed the possible mediating role of self-handicapping strategies in the relationship between perceptions of parental support (content-oriented and autonomy-oriented support) when doing homework and the students’ behavioral engagement (time spent, effort made, amount of homework done, level of procrastination). The participants were 643 students in compulsory secondary education (between 7th and 10th grade). The results showed that the lower the perceptions of support from parents when doing homework, the greater the students’ use of self-handicapping strategies and the worse their behavioral engagement (less effort, less amount of homework done, more procrastination) and vice versa. These findings seem to indicate that self-handicapping is a motivational strategy that would partially explain students’ poor behavioral engagement with homework in the absence of parental support.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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This work was partially funded by the European Regional Development Funds (European Union and Principality of Asturias) through the Science, Technology and Innovation Plan (FC-GRUPIN-IDI/2018/000199), and the research project EDU2017–82984-P (MEIC).

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Núñez, J.C., Freire, C., Ferradás, M.d.M. et al. Perceived parental involvement and student engagement with homework in secondary school: The mediating role of self-handicapping. Curr Psychol 42 , 4350–4361 (2023). https://doi.org/10.1007/s12144-021-01791-8

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How to use homework to support student success.

• by: Sandra Chafouleas
• January 13, 2022
• Community Engagement

Editor’s Note: Board of Trustees Distinguished Professor Sandra Chafouleas shares insights on supporting students’ homework during the pandemic in the following piece, which originally appeared  in Psychology Today , where she publishes a blog.

COVID has brought many changes in education. What does it mean for homework?

School assignments that a student is expected to do outside of the regular school day—that’s homework. The general guideline is 10 minutes of nightly homework per grade level beginning after kindergarten. This amounts to just a few minutes for younger elementary students to up to 2 hours for high school students.

The guidance seems straightforward enough, so why is homework such a controversial topic? School disruptions, including extended periods of remote learning during the COVID-19 pandemic, have magnified the controversies yet also have provided an opportunity to rethink the purpose and value of homework.

Debates about the value of homework center around two primary issues: amount and inequity.

First, the amount of assigned homework may be much more than the recommended guidelines. Families report their children are stressed out over the time spent doing homework. Too much homework can challenge well-being given the restricted time available for sleep, exercise, and social connection. In a 2015 study , for example, parents reported their early elementary children received almost three times the recommended guidelines. In high school, researchers found an average of three hours of homework per night for students living in economically privileged communities.

“ Debates about the value of homework center around two primary issues: amount and inequity.”

Second, homework can perpetuate inequities. Students attending school in less economically privileged communities may receive little to no homework, or have difficulty completing it due to limited access to needed technology. This can translate into fewer opportunities to learn and may contribute to gaps in achievement.

There isn’t a ton of research on the effects of homework, and available studies certainly do not provide a simple answer. For example, a 2006 synthesis of studies suggested a positive influence between homework completion and academic achievement for middle and high school students. Supporters also point out that homework offers additional opportunities to engage in learning and that it can foster independent learning habits such as planning and a sense of responsibility. A more recent study involving 13-year-old students in Spain found higher test scores for those who were regularly assigned homework in math and science, with an optimal time around one hour—which is roughly aligned with recommendations. However, the researchers noted that ability to independently do the work, student effort, and prior achievement were more important contributors than time spent.

Opponents of homework maintain that the academic benefit does not outweigh the toll on well-being. Researchers have observed student stress, physical health problems, and lack of life balance, especially when the time spent goes over the recommended guidelines. In a survey of adolescents , over half reported the amount and type of homework they received to be a primary source of stress in their lives. In addition, vast differences exist in access and availability of supports, such as internet connection, adult assistance, or even a place to call home, as 1.5 million children experience homelessness in the United States

The COVID-19 pandemic has re-energized discussion about homework practices, with the goal to advance recommendations about how, when, and with whom it can be best used. Here’s a summary of key strategies:

Strategies for Educators

Make sure the tasks are meaningful and matched..

First, the motto “ quality over quantity ” can guide decisions about homework. Homework is not busy-work, and instead should get students excited about learning. Emphasize activities that facilitate choice and interest to extend learning, like choose your own reading adventure or math games. Second, each student should be able to complete homework independently with success. Think about Goldilocks: To be effective, assignments should be just right for each learner. One example of how do this efficiently is through online learning platforms that can efficiently adjust to skill level and can be completed in a reasonable amount of time.

Ensure access to resources for task completion.

One step toward equity is to ensure access to necessary resources such as time, space, and materials. Teach students about preparing for homework success, allocating classroom time to model and practice good study habits such as setting up their physical environment, time management, and chunking tasks. Engage in conversations with students and families to problem-solve challenges When needed, connect students with homework supports available through after-school clubs, other community supports, or even within a dedicated block during the school day.

Be open to revisiting homework policies and practices.

The days of penalizing students for not completing homework should be long gone. Homework is a tool for practicing content and learning self-management. With that in mind, provide opportunities for students to communicate needs, and respond by revising assignments or allowing them to turn in on alternative dates. Engage in adult professional learning about high-quality homework , from value (Should I assign this task?) to evaluation (How should this be graded? Did that homework assignment result in expected outcomes?). Monitor how things are going by looking at completion rates and by asking students for their feedback. Be willing to adapt the homework schedule or expectations based on what is learned.

Strategies for Families

Understand how to be a good helper..

When designed appropriately, students should be able to complete homework with independence. Limit homework wars by working to be a good helper. Hovering, micromanaging, or doing homework for them may be easiest in the moment but does not help build their independence. Be a good helper by asking guiding questions, providing hints, or checking for understanding. Focus your assistance on setting up structures for homework success, like space and time.

Use homework as a tool for communication.

Use homework as a vehicle to foster family-school communication. Families can use homework as an opportunity to open conversations about specific assignments or classes, peer relationships, or even sleep quality that may be impacting student success. For younger students, using a daily or weekly home-school notebook or planner can be one way to share information. For older students, help them practice communicating their needs and provide support as needed.

Make sure to balance wellness.

Like adults, children need a healthy work-life balance. Positive social connection and engagement in pleasurable activities are important core principles to foster well-being . Monitor the load of homework and other structured activities to make sure there is time in the daily routine for play. Play can mean different things to different children: getting outside, reading for pleasure, and yes, even gaming. Just try to ensure that activities include a mix of health-focused activities such as physical movement or mindfulness downtime.

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Should Students Have Homework?

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By Suzanne Capek Tingley, Veteran Educator, M.A. Degree

It used to be that students were the only ones complaining about the practice of assigning homework. For years, teachers and parents thought that homework was a necessary tool when educating children. But studies about the effectiveness of homework have been conflicting and inconclusive, leading some adults to argue that homework should become a thing of the past.

What Research Says about Homework

According to Duke professor Harris Cooper, it's important that students have homework. His meta-analysis of homework studies showed a correlation between completing homework and academic success, at least in older grades. He recommends following a  "10 minute rule" : students should receive 10 minutes of homework per day in first grade, and 10 additional minutes each subsequent year, so that by twelfth grade they are completing 120 minutes of homework daily.

But his analysis didn't prove that students did better because they did homework; it simply  showed a correlation . This could simply mean that kids who do homework are more committed to doing well in school. Cooper also found that some research showed that homework caused physical and emotional stress, and created negative attitudes about learning. He suggested that more research needed to be done on homework's effect on kids.

Some researchers say that the question isn't whether kids should have homework. It's more about what kind of homework students have and how much. To be effective, homework has to meet students' needs. For example, some  middle school teachers have found success with online math homework  that's adapted to each student's level of understanding. But when middle school students were assigned more than an hour and a half of homework, their  math and science test scores went down .

Researchers at Indiana University discovered that math and science homework may improve standardized test grades, but they  found no difference in course grades  between students who did homework and those who didn't. These researchers theorize that homework doesn't result in more content mastery, but in greater familiarity with the kinds of questions that appear on standardized tests. According to Professor Adam Maltese, one of the study's authors, "Our results hint that maybe homework is not being used as well as it could be."

So while many teachers and parents support daily homework, it's hard to find strong evidence that the long-held practice produces positive results.

Problems with Homework

In an article in  Education Week Teacher , teacher Samantha Hulsman said she's frequently heard parents complain that a 30-minute homework assignment turns into a three-hour battle with their kids. Now, she's facing the same problem with her own kids, which has her rethinking her former beliefs about homework. "I think parents expect their children to have homework nightly, and teachers assign daily homework because it's what we've always done," she explained. Today, Hulsman said, it's more important to know how to collaborate and solve problems than it is to know specific facts.

Child psychologist Kenneth Barish wrote in  Psychology Today  that  battles over homework rarely result in a child's improvement in school . Children who don't do their homework are not lazy, he said, but they may be frustrated, discouraged, or anxious. And for kids with learning disabilities, homework is like "running with a sprained ankle. It's doable, but painful."

Barish suggests that parents and kids have a "homework plan" that limits the time spent on homework. The plan should include turning off all devices—not just the student's, but those belonging to all family members.

One of the  best-known critics of homework, Alfie Kohn , says that some people wrongly believe "kids are like vending machines—put in an assignment, get out learning." Kohn points to the lack of evidence that homework is an effective learning tool; in fact, he calls it "the greatest single extinguisher of children's curiosity that we have yet invented."

Homework Bans

Last year, the public schools in Marion County, Florida,  decided on a no-homework policy for all of their elementary students . Instead,  kids read nightly  for 20 minutes. Superintendent Heidi Maier said the decision was based on Cooper's research showing that elementary students gain little from homework, but a lot from reading.

Orchard Elementary School in South Burlington, Vermont, followed the same path, substituting reading for homework. The  homework policy has four parts : read nightly, go outside and play, have dinner with your family, and get a good night's sleep. Principal Mark Trifilio says that his staff and parents support the idea.

But while many elementary schools are considering no-homework policies, middle schools and high schools have been reluctant to abandon homework. Schools say parents support homework and teachers know it can be helpful when it is specific and follows certain guidelines. For example, practicing solving word problems can be helpful, but there's no reason to assign 50 problems when 10 will do. Recognizing that not all kids have the time, space, and home support to do homework is important, so it shouldn't be counted as part of a student's grade.

So Should Students Have Homework?

Should you ban homework in your classroom? If you teach lower grades, it's possible. If you teach middle or high school, probably not. But all teachers should think carefully about their homework policies. By limiting the amount of homework and improving the quality of assignments, you can improve learning outcomes for your students.

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Special Topic / The Case For and Against Homework

The Case for Homework

The case against homework, the dangers of ignoring the research, grade level, time spent on homework, parent involvement, going beyond the research.

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Special Topic / The Case For and Against Homework - table

Two meta-analyses by Cooper and colleagues (Cooper, 1989a; Cooper, Robinson, & Patall, 2006) are the most comprehensive and rigorous. The 1989 meta-analysis reviewed research dating as far back as the 1930s; the 2006 study reviewed research from 1987 to 2003. Commenting on studies that attempted to examine the causal relationship between homework and student achievement by comparing experimental (homework) and control (no homework) groups, Cooper, Robinson, and Patall (2006) noted, With only rare exceptions, the relationship between the amount of homework students do and their achievement outcomes was found to be positive and statistically significant. Therefore, we think it would not be imprudent, based on the evidence in hand, to conclude that doing homework causes improved academic achievement. (p. 48)

In a third book, The Homework Myth: Why Our Kids Get Too Much of a Bad Thing (2006a), Kohn took direct aim at the research on homework. In this book and in a recent article in Phi Delta Kappan (2006b), he became quite personal in his condemnation of researchers. For example, referring to Harris Cooper, the lead author of the two leading meta-analyses on homework, Kohn noted, A careful reading of Cooper's own studies . . . reveals further examples of his determination to massage the numbers until they yield something—anything—on which to construct a defense of homework for younger children. (2006a, p. 84)He also attacked a section on homework in our book Classroom Instruction that Works (Marzano, Pickering, & Pollock, 2001).

• Grades 4–6: ES = .15 (Percentile gain = 6)
• Grades 7–9: ES = .31 (Percentile gain = 12)
• Grades 10–12: ES = .64 (Percentile gain = 24)

The pattern clearly indicates that homework has smaller effects at lower grade levels. Even so, Cooper (1989b) still recommended homework for elementary students because homework for young children should help them develop good study habits, foster positive attitudes toward school, and communicate to students the idea that learning takes work at home as well as at school. (p. 90)

• For students in the earliest grades , it should foster positive attitudes, habits, and character traits; permit appropriate parent involvement; and reinforce learning of simple skills introduced in class.
• For students in upper elementary grades , it should play a more direct role in fostering improved school achievement.
• In 6th grade and beyond , it should play an important role in improving standardized test scores and grades.

One of the more contentious issues in the homework debate is the amount of time students should spend on homework. The Cooper synthesis (1989a) reported that for junior high school students, the benefits increased as time increased, up to 1 to 2 hours of homework a night, and then decreased. The Cooper, Robinson, and Patall (2006) study reported similar findings: 7 to 12 hours of homework per week produced the largest effect size for 12th grade students. The researchers suggested that for 12th graders the optimum amount of homework might lie between 1.5 and 2.5 hours per night, but they cautioned that no hard-and-fast rules are warranted. Still, researchers have offered various recommendations. For example, Good and Brophy (2003) cautioned that teachers must take care not to assign too much homework. They suggested that homework must be realistic in length and difficulty given the students' abilities to work independently. Thus, 5 to 10 minutes per subject might be appropriate for 4th graders, whereas 30 to 60 minutes might be appropriate for college-bound high school students. (p. 394)

Cooper, Robinson, and Patall (2006) also issued a strong warning about too much homework: Even for these oldest students, too much homework may diminish its effectiveness or even become counterproductive. (p 53)

• Parents receive clear guidelines spelling out their role.
• Teachers do not expect parents to act as experts regarding content or to attempt to teach the content.
• Parents ask questions that help students clarify and summarize what they have learned.

Good and Brophy (2003) provided the following recommendations regarding parent involvement: Especially useful for parent-child relations purposes are assignments calling for students to show or explain their written work or other products completed at school to their parents and get their reactions (Epstein, 2001; Epstein, Simon, & Salinas, 1997) or to interview their parents to develop information about parental experiences or opinions relating to topics studied in social studies (Alleman & Brophy, 1998). Such assignments cause students and their parents or other family members to become engaged in conversations that relate to the academic curriculum and thus extend the students' learning. Furthermore, because these are likely to be genuine conversations rather than more formally structured teaching/learning tasks, both parents and children are likely to experience them as enjoyable rather than threatening. (p. 395)

Riehl (2006) pointed out the similarity between education research and medical research. She commented, When reported in the popular media, medical research often appears as a blunt instrument, able to obliterate skeptics or opponents by the force of its evidence and arguments. . . . Yet repeated visits to the medical journals themselves can leave a much different impression. The serious medical journals convey the sense that medical research is an ongoing conversation and quest, punctuated occasionally by important findings that can and should alter practice, but more often characterized by continuing investigations. These investigations, taken cumulatively, can inform the work of practitioners who are building their own local knowledge bases on medical care. (pp. 27–28)

Research-Based Homework Guidelines

Assign purposeful homework. Legitimate purposes for homework include introducing new content, practicing a skill or process that students can do independently but not fluently, elaborating on information that has been addressed in class to deepen students' knowledge, and providing opportunities for students to explore topics of their own interest.

Design homework to maximize the chances that students will complete it. For example, ensure that homework is at the appropriate level of difficulty. Students should be able to complete homework assignments independently with relatively high success rates, but they should still find the assignments challenging enough to be interesting.

Involve parents in appropriate ways (for example, as a sounding board to help students summarize what they learned from the homework) without requiring parents to act as teachers or to police students' homework completion.

Carefully monitor the amount of homework assigned so that it is appropriate to students' age levels and does not take too much time away from other home activities.

Balli, S. J. (1998). When mom and dad help: Student reflections on parent involvement with homework. Journal of Research and Development in Education, 31 (3), 142–148.

Bangert-Drowns, R. L., Kulik, C. C., Kulik, J. A., & Morgan, M. (1991). The instructional effects of feedback in test-like events. Review of Educational Research, 61 (2), 213–238.

Bennett, S., & Kalish, N. (2006). The case against homework: How homework is hurting our children and what we can do about it . New York: Crown.

Bloom, B. S. (1984). The search for methods of group instruction as effective as one-to one tutoring. Educational Leadership, 41 (8), 4–18.

Cooper, H. (1989a). Homework . White Plains, NY: Longman.

Cooper, H. (1989b). Synthesis of research on homework. Educational Leadership, 47 (3), 85–91.

Cooper, H. (2007). The battle over homework (3rd ed.). Thousand Oaks, CA: Corwin Press.

Cooper, H., Robinson, J. C., & Patall, E. A. (2006). Does homework improve academic achievement? A synthesis of research, 1987–2003. Review of Educational Research, 76 (1), 1–62.

Corno, L. (1996). Homework is a complicated thing. Educational Researcher, 25 (8), 27–30.

Epstein, J. (2001). School, family, and community partnerships: Preparing educators and improving schools . Boulder, CO: Westview.

Epstein, J. L., & Becker, H. J. (1982). Teachers' reported practices of parent involvement: Problems and possibilities. Elementary School Journal, 83 , 103–113.

Fraser, B. J., Walberg, H. J., Welch, W. W., & Hattie, J. A. (1987). Synthesis of educational productivity research [Special issue]. International Journal of Educational Research, 11 (2), 145–252.

Gill, B. P., & Schlossman, S. L. (2000). The lost cause of homework reform. American Journal of Education, 109 , 27–62.

Good, T. L., & Brophy, J. E. (2003). Looking in classrooms (9th ed.). Boston: Allyn & Bacon.

Graue, M. E., Weinstein, T., & Walberg, H. J. (1983). School-based home instruction and learning: A quantitative synthesis. Journal of Educational Research, 76 , 351–360.

Hattie, J. A. (1992). Measuring the effects of schooling. Australian Journal of Education, 36 (1), 5–13.

Hoover-Dempsey, K. V., Bassler, O. C., & Burow, R. (1995). Parents' reported involvement in students' homework: Strategies and practices. The Elementary School Journal, 95 (5), 435–450.

Kavale, K. A. (1988). Using meta-analyses to answer the question: What are the important influences on school learning? School Psychology Review, 17 (4), 644–650.

Kohn, A. (2006a). The homework myth: Why our kids get too much of a bad thing . Cambridge, MA: Da Capo Press.

Kohn, A. (2006b). Abusing research: The study of homework and other examples. Phi Delta Kappan. 88 (1), 9–22.

Kralovec, E., & Buell, J. (2000). The end of homework: How homework disrupts families, overburdens children, and limits learning . Boston: Beacon.

Marzano, R. J., & Pickering, D. J. (2007). Response to Kohn's allegations . Centennial, CO: Marzano & Associates. Available: http://marzanoandassociates.com/documents/KohnResponse.pdf

Marzano, R. J., & Pickering, D. J. (in press). Errors and allegations about research on homework. Phi Delta Kappan .

Marzano, R. J., Pickering, D. J., & Pollock, J. E. (2001). Classroom instruction that works: Research-based strategies for increasing student achievement . Alexandria, VA: ASCD.

National Education Commission on Time and Learning (1994). Prisoners of time . Washington, DC: U.S. Department of Education.

Paschal, R. A., Weinstein, T., & Walberg, H. J. (1984). The effects of homework on learning: A quantitative synthesis. Journal of Educational Research, 78 , 97–104.

Perkins, P. G., & Milgram, R. B. (1996). Parental involvement in homework: A double-edge sword. International Journal of Adolescence and Youth, 6 (3), 195–203.

Riehl, C. (2006). Feeling better: A comparison of medical research and education research. Educational Researcher, 35 (5), 24–29.

Van Voorhis, F. (2003). Interactive homework in middle school: Effects on family involvement and science achievement. Journal of Educational Research, 96 , 323–338.

Walberg, H. J. (1999). Productive teaching. In H. C. Waxman & H. J. Walberg (Eds.), New directions for teaching practice research (pp. 75–104). Berkeley, CA: McCutchen.

Wallis, C. (2006). Viewpoint: The myth about homework. Time, 168 (10), 57.

• 1 For a more detailed response to Kohn's views on homework, see Marzano & Pickering (2007) and Marzano & Pickering (in press).

Robert Marzano is the CEO of Marzano Research Laboratory in Centennial, CO, which provides research-based, partner-centered support for educators and education agencies—with the goal of helping teachers improve educational practice.

As strategic advisor, Robert brings over 50 years of experience in action-based education research, professional development, and curriculum design to Marzano Research. He has expertise in standards-based assessment, cognition, school leadership, and competency-based education, among a host of areas.

He is the author of 30 books, 150 articles and chapters in books, and 100 sets of curriculum materials for teachers and students in grades K–12.

The late Debra J. Pickering consulted with schools and districts nationally and internationally as vice president of field services for Marzano Research Laboratory. She passed away in 2020.

In addition to her work with schools, Pickering coauthored (with Robert Marzano) educational books and manuals, including  Dimensions of Learning ,  Classroom Instruction That Works ,  Classroom Management That Works , and  Building Academic Vocabulary .

With a combination of theoretical grounding and more than three decades of practical experience, Pickering worked with educators to translate theory into practice. In later years her work continued to focus on the study of learning and the development of resources for curriculum, instruction, and assessment to help all educators meet the needs of all students.

Pickering had a master's degree in school administration and a doctorate in curriculum and instruction, with an emphasis in cognitive psychology.

ASCD is a community dedicated to educators' professional growth and well-being.

Let us help you put your vision into action., from our issue.

Research into the Importance of Homework

Author: Bethany Spencer

Posted: 15 May 2017

Estimated time to read: 10 mins

Homework as a concept has been around for hundreds of years, and today is considered the norm for modern schools. At secondary level, schools set regular homework via a whole-school homework policy. This can take many forms and is sometimes given a different name like 'home learning' or 'Independent study', but the concept of completing work outside of the classroom remains the same.

The setting of homework is regarded highly by many with Epstein‭ ‬&‭ ‬Van Voorhis stating that it not only reflects on the success of the student‭, ‬but also the success of the school‭ (‬2001‭). ‬In spite of this‭, ‬attitudes towards homework are constantly changing‭, ‬culminating in‭ ‬the age old homework debate. ‬

The Homework Debate

Attitudes towards the value and purpose of homework are usually reflective of the current societal stance and general sentiment towards education‭. ‬For example‭,‬‭ ‬in the 20th century the mind was seen as a muscle that would benefit from memorisation‭, and since this could be done at home‭, ‬homework was perceived as valuable‭. ‬However‭, ‬come the 1940s‭ ‬where emphasis shifted from drills to problem solving‭, ‬people started to view homework negatively‭ (‬Cooper‭, ‬1989‭).

Yet, fast forward to 1957, the year Russia launched Sputnik‭, and ‬society became concerned that students were not ready for the advanced technologies that were creeping into modern life, leading many to start favouring homework again‭.

‬Although,‭ ‬reflective of the attitudes in the 1960s, homework fell out of favour with the belief that it put too much pressure on students‭ (‬Cooper‭, ‬1989‭). ‬This is why we find ourselves encased in a spiral of ever changing attitudes towards homework which looks set to continue.

We believe that homework plays an important role in both a student’s education and the performance of the school‭. ‬Here we look at academic research‭, ‬but also take into account the opinion of leading educators who give weight to the stance that homework serves a purpose that penetrates far deeper than improving a student’s general understanding of a subject‭.‬

The Wider Purpose of Homework 

The purpose of homework can be grouped into ten strands as stated by Epstein‭ ‬&‭ ‬Van Voorhis‭ (‬1988‭, ‬2001‭, ‬p.181‭) ‬‘practice‭, ‬participation‭, ‬preparation‭, ‬personal development‭, ‬parent-child relations‭, ‬parent-teacher communication‭, ‬peer interactions‭, ‬policy‭, ‬public relations and punishment‭.‬’‭ ‬ This suggests that homework affects more areas than just a student’s academic ability‭. ‬

However‭, ‬when we look at the research that focuses on the link between homework and academic achievement we see that homework does in fact have a positive impact on students’‭ ‬ grades‭ . ‬Sharp‭ (‬2002‭) ‬states there is a direct link between students spending time on homework and their achievement in secondary school‭.

‬‬Cooper similarly found that students who completed homework had better report cards and test results than‭ ‬those who didn't (‬1989‭ ‬cited by Epstein‭ ‬&‭ ‬Van Voorhis 2001‭). ‬In a report conducted by the EEF‭, ‬they also found that the completion of homework at secondary level can add on an additional 5‭ ‬months‭ ‬progress onto a child’s learning‭ with minimal cost incurred by the school‭ (‬EEF‭, ‬2016‭). ‬

In addition to the academic findings‭, ‬teachers themselves have commented on the purpose they believe homework provides to students and schools‭. ‬Epstein‭ (‬1988‭, ‬2001‭, ‬p.181‭) ‬found that teachers recognised‭ ‬‘practice‭, ‬preparation and personal development’‭ ‬to contribute to the overall purpose of homework‭. ‬

Homework helps to " develop learners' knowledge and allow them more choice in how they express their work"

Tom Sherrington‭, ‬a Headteacher at a UK secondary school and influential education blogger‭, ‬has expressed his personal views on the value of homework‭: ‬‘Students who are successful at A Level and at GCSE are those who have highly developed independent learning skills‭, ‬have the capacity to lead the learning process through their questions and ideas’‭ (‬Sherrington 2012a‭). ‬

This suggests that even those who do not see an immediate impact from homework‭, ‬believe that it will help students’‭ ‬personal development but also prepare them for the next stages of education and beyond‭. ‬This is further supported by Sharp‭ (‬2002‭) ‬who recognised that‭, ‬despite homework not having a direct link to achievement in younger children‭, ‬it did promote independent‭ ‬learning and prepare them for secondary school‭.‬

A second UK teacher and education blogger‭, ‬Rachel Jones‭, ‬commented on what she believes to be the purpose of homework and found‭ ‬that it had a positive impact on both retention of knowledge and hand-in rates when the homework set‭ ‬was assigned with the intention to‭ ‬‘develop learners knowledge and allow them more choice in how they express their work’‭ (‬Jones 2013‭).

Parental Involvement 

In addition to the correlation between completing homework and improved achievement‭, ‬homework plays a fundamental role in both home-school involvement and students’‭ ‬relationships with their parents‭. ‬A key purpose of homework outside of‭ ‬‘enhancing instruction’‭ ‬is to‭ ‬‘establish communication between parent and child’‭ (‬Acock‭ ‬&‭ ‬Demo‭, ‬1994‭ ‬cited by Cooper et al‭, ‬20016‭, ‬p.2‭). ‬

Homework acts as a bridge between school and home‭, ‬and the ability to engage parents in school life has a positive impact on teachers‭ - ‬when teachers feel as though there is more parental involvement in school they feel more positive about teaching‭ (‬Epstein‭ ‬&‭ ‬Dauber‭, ‬1991‭, ‬Hoover-Dempsey et al‭, ‬1987‭ ‬cited by Epstein‭ ‬&‭ ‬Van Voorhis‭, ‬2001‭).

‬Acock and Demo‭ (‬1994‭, ‬cited by Epstein‭ ‬&‭ ‬Van‭ ‬Voorhis 2001‭, ‬p.182‭) ‬have even stated that homework can help to improve relationships between parents and students, ‬bringing them‭ ‬‘closer together to enjoy learning and exchange ideas’‭, ‬cementing the idea that homework has greater repercussions than just raising academic achievements within school‭.‬

In addition to this‭, ‬a purpose of homework valued by both parents and teachers‭ ‬is the idea that homework completed regularly by‭ ‬students helps to promote‭ ‬‘a sense of‭ ‬responsibility’‭ (‬Warton 1997‭, ‬p.213‭). Moreover‭, ‬Sherrington‭ (‬2012b‭) ‬comments on his stance as both an educator and a parent‭ ‬saying that he firmly believes that homework has a fundamental part to play in the learning process‭ ‬‘and paving the way to students becoming independent learners’‭. ‬

Quality Homework 

Although ‬in order for homework to really show the benefits expressed in this article it must be purposeful‭ . ‬Students have expressed their‭ ‬opinion on the value of homework‭, ‬deeming it to be an important part of the learning experience‭ (‬Sharp 2002‭). ‬

Yet‭, ‬they do express concerns regarding how homework is set relating to‭ ‬‘conflicting‭ ‬deadlines‭, ‬and tasks that make little contribution to learning’‭ (‬Sharp 2002‭, ‬p.3‭). ‬In order to combat these concerns‭, ‬schools should be vetting the quality of homework set‭, ‬and teachers should be communicating with one another in reference to deadlines‭.‬

The idea of setting purposeful homework is further supported by Epstein‭ ‬&‭ ‬Van Voorhis‭ (‬2001‭, ‬p.19‭) ‬who report that those who set homework‭ ‬‘to meet specific purposes and goals‭, ‬more students complete their homework and benefit from the results’‭. ‬Additionally‭, ‬the idea of setting homework with a clear purpose further encourages parental involvement within the child’s education‭. ‬

"Quality homework types to include‭ ‬‘fluency practice‭, application‭, ‬spiral review and extension"

Purposeful homework is intrinsically linked to quality homework ‭, ‬and when teachers are setting homework the emphasis should be on this as opposed to the quantity‭. ‬In order for homework to be regarded as high quality‭, ‬the instruction provided must be clear‭ ‬and detailed‭ (‬Frey‭ ‬&‭ ‬Fisher‭, ‬2011‭), ‬and the tasks that are being set are‭ ‬‘authentic and engaging’‭ (‬Darling-Hammond‭ ‬&‭ ‬Ifill-Lynch 2006‭, ‬p.1‭) ‬providing students with a real reason to complete them‭. ‬

This is further supported by Dettmers et al‭ (‬2010‭) ‬who found that when students identified homework as being well thought out and relevant‭, ‬they were more motivated to complete it‭. ‬Frey‭ ‬&‭ ‬Fisher‭ (‬2011‭) ‬identified quality homework types to include‭ ‬‘fluency practice‭, ‬application‭, ‬spiral review and extension’‭ ‬and denounced the value of homework that asks students to complete work that was not covered in class as not valuable as they have no peer or teacher support and are unfamiliar with the topic‭. ‬

It is also important to consider the implications of focusing on the amount of homework set ‭ - ‬setting too much homework can have‭ ‬detrimental effects on students‭, ‬such as stress‭, ‬fatigue and loss of interest in studies‭ (‬Cooper‭, ‬2010‭). ‬

From this we can gather that fewer pieces of well thought out homework will have more of a positive impact on students’‭ ‬learning‭. ‬It is important for schools to monitor the amount of homework that is set‭, ‬what is being set and the frequency ‬so as to avoid‭ ‬over-working students‭ - having a homework policy which teachers adhere to will help to enforce this. 

The Overall Importance of Homework

Homework encourages self-development and self-discipline. Students who complete regular homework don't just perform better at school and during exams, they learn broader life skills and associate hard work with long term rewards. Homework has also been found to improve parental relationships.

Conclusion 

From this we can conclude‭ ‬that homework does indeed serve a purpose‭ as studies provide a link between homework and higher‭ ‬secondary school attainment‭. ‬Yet despite a lack of research to suggest these effects in primary school and younger years‭, ‬homework will help to prepare students younger than 11 for secondary school and encourages them to become independent learners‭. ‬

The setting and completion of homework also has benefits outside of academic attainment with parent-child relationship and home-school involvement both improving within schools as a result of successful homework practice.

However, it must be taken into consideration that in order to experience the benefits of homework, the work being set should have a clear goal, as well as being worthwhile and purposeful to encourage students to complete it.

References:

Cooper, H., 1989. Synthesis of Research on Homework. Effective Schools Research Abstracts [online], 4 (1), 85-91

Cooper, H., 2010. Homework’s Diminishing Returns. The New York Times [online], 12 December 2010. Available from: http://www.nytimes.com/roomfordebate/2010/12/12/stress-and-the-high-school-student/homeworks-diminishing-returns [Accessed 1 July 2016]

Cooper, H. and Robinson, J.C. and Patall, E.A., 2006. Does Homework Improve Academic Achievement? A synthesis of Research, 1987-2003. Review of Education Research [online], 76 (1), 1-62

Darling-Hammond, L. and Ifill-Lynch, O., 2006. If They’d Only Do Their Work! Educational Leadership [online] 63(5), 8-13, Available from: http://www.ascd.org/publications/educational-leadership/feb06/vol63/num05/If-They%27d-Only-Do-Their-Work!.aspx [Accessed 1 July 2016]

Dettmers, S at al., 2010. Journal of Educational Psychology. Homework works if homework quality is high: Using multilevel modeling to predict development of achievement in mathematics. [online], 102(2), 467-482. Available from: http://psycnet.apa.org/journals/edu/102/2/467/ [Accessed 1 July 2016]

EEF, 2016. Teaching and Learning Toolkit [online] London. Available from: https://educationendowmentfoundation.org.uk/evidence/teaching-learning-toolkit [Accessed 1 July 2016]

Epstein, L.J. and Van Voorhis, F.L, 2001. More than Minutes: Teachers’ Roles in Designing Homework. Educational Psychologist [online], 36 (3), 181-193

Frey, N. and Fisher, D., 2011. High-Quality Homework [online] USA: Principal Leadership. Available from: http://fisherandfrey.com/uploads/posts/Homework_NASSP.pdf [Accessed 1 July 2016]

GOV.UK, 2015. School Inspection Handbook from 2015 [online]. England: The National Archives. Available from: https://www.gov.uk/government/publications/school-inspection-handbook-from-september-2015 [Accessed May 2016)

Jones, R., 2013. DESTROY Homework. Create Innovate Explore [online] 12 August 2013. Available from: http://createinnovateexplore.com/destroy-homework/ [Accessed May 2016]

Sharp, C., 2002. Should Schools set Homework? National Foundation for Educational Research [online], 27 (1), 1-4

Sherrington, T., 2012. Homework Matters: Great teachers set great homework. Headguruteacher [online]. 2 September 2012. Available from: https://headguruteacher.com/2012/09/02/homework-matters-great-teachers-set-great-homework/ [Accessed May 2016]

Sherrington, T., 2012. Homework: What does the Hattie research actually say? Headguruteacher [online] 21 October 2012. Available from: https://headguruteacher.com/2012/10/21/homework-what-does-the-hattie-research-actually-say/ [Accessed May 2016]

Warton, P.M. 1997. Learning about responsibility: Lessons from homework. British Journal of Educational  Psychology [online], 67(2), pp. 213–221

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